Anyone else have these problems?

I've had this problem alot, at least on my version. .
I'm not sure if they are extreamly different but I'm guessing that gameplay is a little different from a console and computer. . I have the computer one and it seems that i'm having this problem alot.

In certain levels where you have to throw a certain amount of enemies onto/into something it just never seems to work!

like in the level where you have to throw (i think its two) baddies onto the elecrical boxes. . well I did two each. . and then four each, and then 6 each. . after about having (atleast!) ten on each it finally let me throw. . . and then in the level right after that in the Club where you have to throw a baddie into the speakers, well same thing there. . it was anywhere from 3 - 10 on each one.

i'm just asking if anyone else has had this extreamly annoying problem or is it just me?